"If you're in the market for a kid tablet, you want to keep in mind how many kids are going to be sharing it, the ages of the kids, what kind of screen size you want. They come in phone size and they come in full 10-inch tablet size," said Carol Mangis with Consumer Reports.

The $230 KD Interactive Kurio 10 with its large 10-inch screen and wide viewing angle is good for two kids to watch at a time. It has a healthy battery life, averaging more than seven hours.

All the tablets tested include pre-loaded, kid-appropriate content, a Wi-Fi connection and a camera. All of them have parental controls, but these vary.

"Parental controls can let you determine how long your kid can play on the tablet. You can also set access to the Internet, whether you want them to be able to go to the web or not, and if so, which sites they can access," said Mangis.

The Ematic FunTab Mini 2, for $70, allows parents to set up individual profiles, so different kids can have age-appropriate experiences.

But one drawback, its battery averages just four-and-a-half hours. Most of the kid tablets come with a little extra protection, grippable frames that make them extra kid-friendly.

Consumer Reports also tested a tablet from Toys R Us. The $150 Tabeo e2 has nearly eight hours of battery life, and comes loaded with 30 child-oriented games and apps.